Maho Bay, United States Virgin Islands offers 1 beach perfect for sunbathing, surfing, swimming, and more. Maho Bay, Saint John, United States Virgin Islands, is known for its stunning beach and the opportunity to swim with sea turtles. The best time to travel to Maho Bay, United States Virgin Islands, is from December to April, with average air temperatures around 77-82°F (25-28°C) and water temperatures about 79-82°F (26-28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!